Heterocyclic phosphorus ligands from cluster-bonded allenylidene

6 Nitrogen, phosphorus, arsenic, antimony and bismuth

“…The reactions are believed to proceed via double nucleophilic attack of the diphosphine on an intermediate allenylidene complex. 43 The selective functionalisation of a single phosphorus atom in a molybdenum complex of 1,5,9-triphosphacyclododecane has been achieved by deprotonation and reaction with a functionalised alkyl halide. 44 A study of the propensity of phosphinines to adopt η 1 -and η 6 -coordination modes on ruthenium has been undertaken.…”

16 The noble metals

“…Reactions with RCCR (R = Me or Ph) gave more C-C bond formation to form [Ru 3 (µ 3 -CR-CRCCCPh 2 )(CO) 9 ] and a small yield of [Ru 4 (µ 4 -CPhCPhCCCPh 2 )(CO) 12 ]. 66 Further studies of the reactivity of [Ru 3 (µ-H)(µ 3 -C 2 CH 2 OH)(CO) 9 ] discovered the double attack of diphosphines with HBF 4 ؒOMe 2 on the allenylidene to give diphosphacycloalkynes, as when dppm produced [Ru 67 The 71 New nitride and nitrene carbonyl cluster complexes containing both Ru and Co arose from many reactions, including that of [Ru…”

Syntheses and molecular structures of Ru3(μ-H)(μ3-CPh2CCCCPh)(CO)9 and Ru3{μ3-CPhCHCC(CPh2)CHCPh}(μ-CO)(CO)8

“…A common precursor of the allenylidene clusters is the alkyne complex Ru 3 (l-H){l 3 -C 2 CPh 2 -(OH)}(CO) 9 (1) which, with HBF 4 Á OMe 2 rearranges by migration of OH to the cluster to give allenylidene 2 (Scheme 1). Since then, several accounts of their reactivity have appeared [4][5][6], including studies of their reactions with alkynes [7][8][9]. Two major types of product were obtained upon reaction of 2 with alkynes, containing either one (3) or two alkyne molecules (4) [8].…”